I have to say that I tried to join at least 30 airdrops, but I just received real token airdrop from only 4 projects. The rest of them actually was an attempt to grab data when not real and pure scam. It's sad, because a so big amount of people trying to scam is a danger for "the altcoin economy".
I am so sorry for you, hope you get lucky next time.
I apply everyday for airdrops (only free airdrops) and I collected about 1 ETH by trading on Etherdelta in 2 weeks.
Sometimes you get nothing, sometimes you get tokens that are worth nothing, and sometimes you get lucky.